x64: Improve codegen for splats #6025
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
github-actions
bot
added
cranelift
Subscribe to Label Action
This issue or pull request has been labeled: "cranelift", "cranelift:area:x64", "isle"
Thus the following users have been cc'd because of the following labels:
To subscribe or unsubscribe from this label, edit the |
github-merge-queue
bot
removed this pull request from the merge queue due to a conflict with the base branch
This commit goes through the lowerings for the CLIF `splat` instruction
and improves the support for each operator. Many of these lowerings are
mirrored from v8/SpiderMonkey and there are a number of improvements:
* AVX2 `v{p,}broadcast*` instructions are added and used when available.
* Float-based splats are much simpler and always a single-instruction
* Integer-based splats don't insert into an uninit xmm value and instead
start out with a `movd` to move into an `xmm` register. This
thoeretically breaks dependencies with prior instructions since `movd`
creates a fresh new value in the destination register.
* Loads are now sunk into all of the instructions. A new extractor,
`sinkable_load_exact`, was added to sink the i8/i16 loads.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This commit goes through the lowerings for the CLIF
splatinstruction and improves the support for each operator. Many of these lowerings are mirrored from v8/SpiderMonkey and there are a number of improvements:v{p,}broadcast*instructions are added and used when available.movdto move into anxmmregister. This thoeretically breaks dependencies with prior instructions sincemovdcreates a fresh new value in the destination register.sinkable_load_exact, was added to sink the i8/i16 loads.